EP 0305197 B1 19920603 - METHOD FOR MAKING A GRAPHITE FILM OR SHEET AND RADIATION OPTICAL ELEMENTS USING THE GRAPHITE SHEET
Title (en)
METHOD FOR MAKING A GRAPHITE FILM OR SHEET AND RADIATION OPTICAL ELEMENTS USING THE GRAPHITE SHEET
Publication
Application
Priority
- JP 19253788 A 19880801
- JP 21211287 A 19870826
- JP 21211387 A 19870826
Abstract (en)
[origin: EP0305197A2] This invention relates to a method for making a graphite sheet or block which comprises hot pressing at least two films of a polymer selected from a polyoxadiazole, an aromatic polyamide and an aromatic polyimide at a pressure not lower than 0.4 MPa (4 kg/cm<2>) at temperatures not lower than 2200 DEG C. Alternatively, the at least two films may be thermally treated at temperatures of not lower than 2200 DEG C and subsequently hot pressed at a pressure of not lower than 0.4 MPa (4 kg/cm<2>) at a temperature of not lower than 2000 DEG C when the at least two films are made of the polyoxidiazole or aromatic polyamide or at a temperature of not lower than 1600 DEG C when the at least two films are made of the aromatic polyimide.
IPC 1-7
IPC 8 full level
C04B 35/524 (2006.01)
CPC (source: EP US)
C04B 35/524 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0305197 A2 19890301; EP 0305197 A3 19900711; EP 0305197 B1 19920603; DE 3871660 D1 19920709; DE 3871660 T2 19930121; US 4954193 A 19900904
DOCDB simple family (application)
EP 88307924 A 19880826; DE 3871660 T 19880826; US 23699988 A 19880826